未知题型
有关传染病的特点，下列哪项是错误的?
- A.有季节性
B.有特异的病原体
C.有一定的潜伏期
D.发病人数多
【参考答案】
D
【正解】传染病的特点是有病原体，有传染性和流行性，感染后常有免疫性。有些传染病还有季节性或地方性。
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